Abstract:
A vehicle compass system for compensating for magnetic disturbances caused by a moveable vehicle accessory includes a magnetic field sensor and a control circuit coupled to the moveable vehicle accessory and the magnetic field sensor. The magnetic field sensor is positioned at a distance from the moveable vehicle accessory and is configured to determine an orientation of the magnetic field sensor with respect to the Earth's magnetic field and to generate magnetic field data. The control circuit is configured to receive a position signal from the moveable vehicle accessory indicating whether the moveable vehicle accessory is changing position, to receive magnetic field data from the magnetic field sensor, to compare first magnetic field data generated prior to the change in position of the moveable vehicle accessory to second magnetic field data generated after the change in position of the moveable vehicle accessory and to generate a correction value based on the comparison of the first magnetic field data and the second magnetic field data. The correction value is used to correct for the magnetic disturbance caused by the moveable vehicle accessory.
Abstract:
An improved air diffuser for shooting ranges and the like is both inexpensive, easy to transport, and easy to maintain. Flexible plastic is utilized for the diffuser plates providing easier manufacture and shipment of an unassembled diffuser.
Abstract:
A system and method for embedding data transmission in a web page, enabling communication between a user and a representative includes requesting a web page which includes at least one nondisplay space object and at least one display space object which is configured to transmit data to and from a backend server without the necessity of refreshing the current page, redirection to another web page, or posting to another web page. The web page is rendered and includes at least one display space and at least one nondisplay space according to the display space object and the at least one nondisplay space object. The display space object may connect with the backend server to form a persistent communication channel to enable real-time communication, and/or it may transmit data through invisible HTTP/HTTPS requests, or both. A persistent communication channel may be initiated by the display space object, triggered by the end user, or initiated by the backend representative.
Abstract:
A receiver for orthogonal frequency division multiplexed signals includes means (14) for calculating the (discrete) Fourier Transform of the received signal, and means (20) for calculating the phase error due to local oscillator errors.
Abstract:
The disclosure relates to a magnetometer in which direction of the Earth's magnetic field is determined on the basis of time variant differences in the inductance of a sensor coil of the digital compass which is a function of the orientation of the sensor coil with respect to the Earth's magnetic field. The magnetometer includes a sensing coil, a feedback resistor, and a comparator.
Abstract:
There is provided a magnetic bearing drive circuit driven from a pair of Direct Current (DC) link voltage rails, said magnetic bearing drive circuit having at least one amplifier providing an output PWM drive signal for driving a magnetic bearing winding, said output PWM drive signal being provided to the magnetic bearing winding through a plurality of drive signal rails, said magnetic bearing drive circuit comprising a pair of voltage offset devices coupled to the DC link voltage rails and arranged to provide a pair of offset catcher voltage rails from the DC link voltage rails, and primary clamping means coupled between each off-set catcher voltage rail and a respective one of the drive signal rails.
Abstract:
A multifunction target actuator allows a bullet target to be selectively presented to a shooter such that a first side may be presented, a second side opposite the first side may be presented, and the target may be oriented so as not to be presented to the shooter. The actuator allows for quick and accurate movement of the target.
Abstract:
In one embodiment, an implantable stimulation lead for delivering electrical stimulation to tissue of a patient, the implantable stimulation lead comprises: a lead body comprising a plurality of wires strands that form a solid helical hollow tube that is maintained by mutual contact pressure of neighboring wire strands, wherein the plurality of wire strands comprise an outer coating of non-conductive material to electrically isolate each of the plurality of wire strands from each other; and a plurality of electrodes with each electrode being electrically coupled to one of the plurality of wire strands.
Abstract:
The present invention refers to a magnetometer (2) comprising a relaxation oscillator build up by a sensing coil (10), a feedback resistor (118) and a comparator (20), wherein an output node (107) of the comparator (20) is connected via the feedback resistor (118) to a first input node (102) of the comparator (20) and via the sensing coil (10) to a second input node (103) of the comparator (20), wherein the first input node (102) is controllable by an alternating first input signal (110) and wherein the second input node (103) is controllable by an inversely alternating second input signal (111).